Warp stop-motion



R. G. TURNER. WARP STOP monow. APPLICATION FILED FEB. 19, 1920.

WWW D m R. G. TURNER.

WARP STOP MOTION.

7 APPLICATION FILED FEB. 19. 1920-.

1,375,743. Patented Apr. 26,1921.

2 SHEETS-SHEET 2.

lTE ETATE PATENT OFFICE.

RICHARD GREENLEAF TURNER, 0F VTORCESTER, MASSACHUSETTS, ASSIGNOR TOGEOIVIPTON & KHOVILES LOOM "WORKS, 03F WORCESTER, MASSACHUSETTS, A.

CORPORATION OF MASSACHUSETTS.

'WARP STOP-MOTION.

Specification of Letters Patent.

Patented Apr. 26, 1921.

Application filed February 19, 1920. Serial No. 359,834.

T 0 all to from it may concern Be it known that 1, RICHARD GREENLEAFTURNER, a citizen of the United States, residing at Worcester, in thecounty of Worcester and State of Massachusetts, have invented a new anduseful Warp Stop-Motion, of which the following is a spec1fication.

This invention relates to a warp stop motion for looms of the type inwhich a single drop wire is used to indicate breakage of either one oftwo adjacent warp threads.

It is the object of my invention to provide a warp stop motion in whichangular movement of a drop wire from normal vertical position willeflect loom stoppage. Breakage of one of the two supporting warp threadswill cause displacement of the drop wire in one direction, whilebreakage of the other supporting warp thread will cause similardisplacement in the opposite direction.

In the drawings, 1 have shown my invention as embodied in a warp stopmotlon of the general type shown in the Regan Patent No. 1,265,112,issued May 7, 1918, in which indicating bars extend through openings inthe drop wires, and in which the loom is stopped when free angularmovement of the indicating bars is prevented.

Further features of my invention relate to arrangements and combinationsof parts which will be hereinafter described, and more particularlypointed out in the appended claims.

Two forms of my invention are shown in the drawings, in which- Figure 1shows my improved construction in front elevation and the drop wiresomitted;

Fig. 2 shows the same parts in side elevation;

Figs. 3 and 4 are diagrammatic side elevations illustrating theoperation of the device;

Figs. 5 and 6 represent the drop wire in inoperative and operativepositions, and

Fig. 7 shows a modified form of drop Wire.

Referring to the drawings my improved stop motion comprises a frame 10supported on rods 11, which in turn are supported by the loom side. Across rod 12 preferably of triangular cross section connects the twoopposite side members of the member 21 is regularly oscillated by a link23 by which it is connected to suitable driving mechanism (not shown).

A slide 24 is mounted on the side of the member 21 in alinement with thestud 19 and is yieldingly pressed against a flat surface on the side ofthe actuator 18 by a spring 25 (Fig. 2). The slide and spring thusmaintain the actuator 18 yieldingly in normal position with a stud 26 inan upwardly projecting arm 27 of the actuator alined with the stud 22 onthe frame 10.

The stud 26 furnishes a bearing for one end of the connector 28 throughwhich the loom stopping mechanism is controlled, said mechanism beingrendered operative by movement of the connector 28 in either direction.One example of such loom stopping mechanism is found in the patent toRichardson, No. 1,268,152, issued June 4, 1918.

The drop wires W used in my improved stop motion are preferably of theform shown in Figs. 5 and 6, each wire comprising a flat body portionhaving a long substantially T-shaped opening in the center thereof. Thelateral portions 30 at the upper end of the opening are contracted toengage the indicator bar 18 and prevent angular movement thereof. Anenlarged opening 31 is provided at the point where the vertical portion32 and the lateral portions 30 of the slot are joined, in which enlargedopening free angular movement of the indicator bar is permitted. The rod12 extends through an enlarged intermediate portion 33 of the verticalslot 32 and acts as a guide for the drop wires and also as a support forthe warp threads.

Each drop wire W is also preferably provided with spaced projections 84adapted to engage adjacent warp threads T and T, which support the dropwires W by such engagement. A wire thus supported is shown in Fig. 5 andthe an ular displacement which follows the brealring of one of the twowarp threads clearly shown in Fig. (5. It will be seen that a drop wireai'ter warp breakage moves angularly until the indicator bar 13 isreceived in one of the contracted lateral end portions 30 ot the openingin the wire.

The subsequent operation of the device will be better understood byreference to Figs. 3 and So long as the indicating bar is free to moveangularly ig. 3), the actuator 18 turns with the member 21 about theaxis of the stud 22 and in so doing rocks the arm 15 and gives theindicator bar 13 an angular movement. When, however, such movement oi?the bar is prevented. by engagement thereof by a fallen drop wire (Fig.(3), the stud 16 (Fig. l) becomes the center of movement for theactuator and continued movement of the member 21 moves the stud 26 inthe arm 27 of the actuator to the dotted line position in Fig. 4i, thuscausing longitudinal movement of the connector 28 which in turn stopsthe loom. It the warp thread T instead of the thread T were broken, theoperation would be the same, but the drop wire W would be tilted in theopposite direction and the displacement of the connector 28 would alsooccur in the opposite direction.

If both warp threads supporting a single drop wire are broken at thesame time, the wire may fall directly downward instead of movingangularly. .he wire may then be supported in mid-position for a shorttime but the convex upper edge of the transverse slot facilitatesmovement of the wire in one direction or the other so that it is soontilted sufliciently to engage the bar 13 and stop the loom.

In Fig. 7 I have shown a modified form of drop wire W in which thecentral vertical slot is omitted, and in which the supportingrod 12 isreplaced by a pair of li'OflS 85 extending along the sides of the dropwires. The action of the wire will be the same as previously set forth.

7 Having thus described my invention, it will be seen that i haveutilized the principle of the Regan stop-motion, while at the same timereducing by one-halt a number of drop wires necessary for its operation.This result is of particular importance in sill; looms in whicn a verylarge number of line warp threads are used. It will be evident thatother changes and modifications may be made in my invention by thoseskilled in the art within the spirit and scope thereof as set iorth inthe claims, and I do not wish to be otherwise limited to the detailsherein disclosed, but what I do claim. is z- 1. In a loom, a warp stopmotion comprising a plurality of drop wires each sustained ininoperative position by the joint action of two adjacent warp threads,an indicating bar extending through said drop wires, means to give saidbar an oscillating angular indicating movement, such movement be ingprevented by a fallen drop wire on the breaking of either warp threadsustaining said wire although the other thread sustain= ing said wireremains unbroken, a loom stopping connection, and means to render saidconnection operative when angular movement of said bar is thusprevented.

2. in a loom, a warp stop-motion compris ing a plurality of drop wiressupported for substantial angular movement, an indicating bar extendingthrough said drop wires and having tree angular indicating movementwhensaid drop wires are in mid-position but held from such movement whensaid drop wires are substantially displaced angularly in eitherdirection,means to move said indicating bar, a connection effective tocause stoppage otthe loom when displaced longitudinally in eitherdirection, and means to effect such displacement when free angularindicating movement of the said bar is prevented.

3. ln a loom, a warp stop motion comprising a plurality of drop wiressustained in ino erative nosition b T the 'oint act-ion of two adjacentwarp threads, an indicating bar ending through said drop wires, means togive said bar an oscillating angular indiig movement, and loom stoppingmechain controlled. by said indicating bar, any of said drop wires uponthe breakage either of its sustaining threads becoming "ectii e toprevent further angular indicating move oi: said bar and to thereby pthe loom, although the other thread u taming said wire remains unbroken.

4;. in a loom, a drop wirecomprising a body having a laterally extendingopening in its upper por 'on, enlarged at the center reduced at bothends, and having also laterally separated warp thread receivingopenings, said wire being normally supp ted by warp threads extendingthrough sa'i l openings.

5. In a loom, a drop wire comprising a body having a laterally extendingopening its upper end enlarged at the center and reduced at both ends,and having warp thread engaging projections on each side of said body,whereby said wire is normally supported on two adjacent warp threads.

6. ln a loom, a d op wire comprising a oody having a substantiallyT-shaped slot therein, reduced at its extreme lateral portions, andhaving two thread receiving openings one on each side of said centralslot but spaced therefrom.

7. In a warp stop-motion, a drop Wire having a body with a long centralsubstantially T-shaped slot open at its lower end, and having twoseparated thread engaging portions.

8. In a loom, a drop wire comprising a body having a substantiallyT-shaped slot therein, reduced at its extreme lateral portions andhaving an enlargement intermediate the upper and lower ends of saidslot, said drop Wire having also separated warp thread engagingprojections, one on each side of said slot.

9. In a 100111, a drop wire comprising a body having a laterallyextending opening in its upper portion, and having also two laterallyseparated warp thread receiving openings, said laterally extendingopening being enlarged at the center and reduced at both ends and havingits upper edge convex downwardly.

In testimony whereof I have hereunto afiixed my signature.

RICHARD GREENLEAF TURNER.

